constructorInjection.scala

trait TopLevelComponent {
  val blogRepo: BlogRepo
  val postRepo: PostRepo
  val authRepo: AuthRepo
  val blogServ: BlogServ
  val postServ: PostServ
  val authServ: AuthServ
}

trait TopLevelComponentImpl extends TopLevelComponent {
  val authRepo: AuthRepo = new AuthRepoImpl()
  val blogRepo: BlogRepo = new BlogRepoImpl(authRepo)
  val postRepo: PostRepo = new PostRepoImpl(blogRepo, authRepo)
  val authServ: AuthServ = new AuthServImpl(authRepo)
  val blogServ: BlogServ = new BlogServImpl(blogRepo)
  val postServ: PostServ = new PostServImpl(postRepo)
}